How do you order least to greatest in decimal

Like any other numbers. The smallest number goes on the left and the largest on the right. Example:
.05, .12, .3, .5

Depends how many points there are. 1.2 is equal to 1.20. 1.2 is less than 1.21. If you find it difficult, Just add the extra 0's like say it was 2.3 compared to 2.354. Add the 0's to 2.3 and it will be 2.300 <2.354